Static field route #429

What do I do when duct size installed smaller than print?

Airflow/TAB Impacts From InstallationV136 field-polished — distinct TAB/airflow answer

Stop before covering or continuing. Wrong-size duct can change airflow, connections, insulation clearance, and inspection results.

Field checklist

The print shows [size], but this installed/staged duct is [size] at [location]. Do you want this held before we continue?

Do not keep hanging the wrong size duct because the pieces are already staged.

A duct can fit physically and still be wrong. Size affects airflow, pressure, connections, and whether downstream pieces line up.

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